import React, { useState, useEffect } from 'react';
import Web3 from 'web3';
import { useParams, Link, useNavigate } from 'react-router-dom';
import AdminNavBar from './nav/AdminNavBar.js';

import PointsExchangeABI from "../contract/ABIs/PointsExchange.json"; // 积分兑换合约合约 ABI
import AdminABI from '../contract/ABIs/Admin.json'; // 管理员合约 ABI

import PointsExchangeAddress from "../contract/ADDRESSes/PointsExchangeAddress.js" // 积分兑换合约地址
// import '../static/indexcss/aacsss.css';
import Admin_integralNavBar from './nav/Admin_integralNavBar.js'
import gb from '../static/bootstrap/images/gb.svg';
import us from '../static/bootstrap/images/us.svg';
import user3 from '../static/bootstrap/images/user3.png';
import Head from './nav/Head.js';

const Admin_AddExchangeRule = () => {
    const [web3, setWeb3] = useState(null);
    // 使用 useParams 获取路由参数中的地址信息
    const { address } = useParams();
    const [contractPointsExchange, setcontractPointsExchange] = useState(null);
    const [contractAdmin, setcontractAdmin] = useState(null);
    const [isAdmin, setIsAdmin] = useState(false);

    const [pointsRequired, setPointsRequired] = useState('');
    const [gift, setGift] = useState('');
    const navigate = useNavigate();

    useEffect(() => {
        async function init() {
            // 连接到以太坊网络
            if (window.ethereum) {
                const web3Instance = new Web3(window.ethereum);
                try {
                    // 请求用户授权
                    await window.ethereum.enable();
                    setWeb3(web3Instance);

                    // 创建积分兑换合约实例
                    const pointsExchangeInstance = new web3Instance.eth.Contract(
                        PointsExchangeABI,
                        PointsExchangeAddress
                    );
                    setcontractPointsExchange(pointsExchangeInstance);

                    // 创建管理员合约实例
                    const adminInstance = new web3Instance.eth.Contract(
                        AdminABI,
                        address
                    );
                    setcontractAdmin(adminInstance);

                    // 获取当前用户的以太坊账户地址
                    const accounts = await web3Instance.eth.getAccounts();
                    const currentAddress = accounts[0];
                    // 获取管理员合约的 owner 地址
                    const ownerAddress = await adminInstance.methods.getOwner().call();
                    // 检查当前账户是否是管理员本人
                    setIsAdmin(currentAddress === ownerAddress);
                } catch (error) {
                    console.error(error);
                }
            } else {
                console.error('请安装以太坊浏览器插件，如 MetaMask');
            }
        }
        init();
    }, [address]);


    // 添加规则函数
    const AddExchangeRule = async () => {
        if (contractPointsExchange) {
            try {
                const accounts = await web3.eth.getAccounts();
                const fromAddress = accounts[0];
                console.log("fromAddress:", fromAddress, "Input:", address, pointsRequired, gift);
                // 调用合约函数
                const result = await contractPointsExchange.methods.addExchangeRule(address, pointsRequired, gift).send({ from: fromAddress });
                alert("添加规则成功")
                navigate(`/admin/${address}/Admin_credits/Admin_RuleList`);
            } catch (error) {
                console.error(error);
                alert("添加规则失败")
            }
        };
    };

    return (
        <div>
            {/* 如果当前账户不是管理员，则显示提示信息 */}
            {!isAdmin && (<div>您没有权限访问此页面。</div>)}

            {/* 管理员界面 */}
            {isAdmin && (
                <div className="page-wrapper" style={{
                    backgroundColor: '#FFFFFF'
                }}>
                    <div className="main-container">
                        <AdminNavBar address={address}></AdminNavBar>

                        <div className="app-container">
                            <Head></Head>
                            <div className="app-body">
                                <div className="container-fluid">

                                    <div>
                                        <main className="page hire-me-page">
                                            <section className="portfolio-block hire-me">
                                                <div className="container">
                                                    <div className="border rounded border-0 shadow-lg p-3 p-md-5"
                                                        data-bs-theme="light"
                                                        style={{
                                                            backgroundColor: 'rgba(36, 36, 41, 0.6)'
                                                        }}
                                                    >

                                                        <h2>添加积分兑换规则</h2>
                                                        <div class="mb-3">

                                                            <div className="mb-3">
                                                                <label className="form-label">所需积分</label>
                                                                <input className="form-control item" type="text" placeholder="所需积分" value={pointsRequired} onChange={(e) => setPointsRequired(e.target.value)} />
                                                            </div>
                                                            <div className="mb-3">
                                                                <label className="form-label">礼品</label>
                                                                <input className="form-control item" type="text" placeholder="礼品" value={gift} onChange={(e) => setGift(e.target.value)} />
                                                            </div>

                                                            <div className="mb-3 mt-4">
                                                                <button className="btn btn-primary btn-lg d-block w-100" onClick={AddExchangeRule}>添加</button>
                                                            </div>

                                                        </div>
                                                    </div>
                                                </div>
                                            </section>
                                        </main>
                                    </div>


                                </div>
                            </div>
                            <div className="app-footer">
                                <span>
                                    © Bootstrap Gallery 2023
                                </span>
                            </div>
                        </div>
                    </div>

                </div>
            )}
        </div >
    );
}

export default Admin_AddExchangeRule;